Tỉ số tiền của Sally và Barry là 6:11 \(\left(\frac{6}{11}\right)\). Nếu Barry đưa 300 đô la cho Sally, họ sẽ có cùng một số tiền. Tính số tiền Sally có lúc đầu?
Answer (Bài giải):
We have the following diagram (Ta có sơ đồ):
The money of Barry (Số tiền của Barry là):
300 : (11 - 6) x 11 = 660 (dollars)
The money of Sally (Số tiền của Sally là):
300 : (11 - 6) x 6 = 360 (dollars)
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1. Complete each number pattern.
44, 22, 10, 10, 8,....,.....
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a, In wich month did she saved $ 210?
b, How much did she save in October?
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Answer:....... dollars.
